Bonecrusher - The Old School RuneScape Wiki
The bonecrusher is a reward from the hard task set of the Morytania Diary. Players can obtain a Bonecrusher from the Ghost disciple in the Ectofuntus building. When carried in the inventory, it will automatically crush bones upon killing a monster. However, players only receive half the Prayer experience with the completion of the Hard tasks. In order to obtain full experience per .